Here's a second video.
Just a note about something I thought of after I recorded the first one is that rather than recoloring after you make the dots, go ahead and make the colors you want in the pattern itself. I had assumed you would think of that on your own, so did not show you, but now I think it is worth mentioning.

Here's the third video! If you know of another way to make polka dots, please do share. I may do another one yet on the Simple and MuRa filters. Eventually, we will have a nice collection of ways here for us to refer to!